I don't know how it stacks up but the reality IMO is...
The industry will evolve. If you have a pay site offering vids and pics and tubes give it for free... your site won't convert that well
My thinking now is cams on a paysite is a must. Surfers will get more free porn then anyone could ever possibly think of stopping... that's a fact.
Technology and virtual internet is right there in front of us and that's how I think the next four years will evolve...